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Versatile everyday utilities and conversion tools. Create custom QR codes, generate secure passwords, convert metric/imperial units, translate time zones and timestamps, convert number bases, and pick hex/RGB colors.
Convert between world currencies with benchmark rates and custom rate override.
Convert dates and times across global time zones (UTC, EST, PST, GMT, IST, JST).
Generate random numbers within a custom range, roll dice, or pick lottery numbers.
Convert Unix epoch timestamps (seconds/ms) to human-readable dates and vice versa.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes simultaneously.
Search and inspect HTTP status codes, error definitions, and troubleshooting tips.
Test password security, calculate entropy bits, and estimate brute-force crack time.
Calculate days, weeks, months, years, and business days between two dates.
Validate email syntax against RFC standards, detect typos, and batch validate.
Format phone numbers into National, International, E.164, and RFC3966 formats.
Convert numbers into written English words in Cardinal and Currency modes.
Convert between Arabic numbers and Roman numerals with step-by-step breakdown.
Calculate exact age difference between two dates in years, months, days, and hours.
Calculate working days between dates excluding weekends and custom holidays.
Create custom live countdown timers with embeddable HTML and shareable links.
Create styled QR codes with custom colors, error correction, and high-res export.
Generate 2D Data Matrix barcodes for industrial tracking, parts, and packaging.
Generate cryptographically secure random alphanumeric strings in bulk batches.
Generate batches of 1 to 500 RFC 4122 v4 UUIDs as text, JSON, or SQL inserts.
Calculate exact elapsed time between two dates in days, hours, minutes, and seconds.
Roll virtual polyhedral dice (D4, D6, D8, D10, D12, D20, D100) with math modifiers.
Generate memorable, high-entropy Diceware multi-word security passphrases.
Generate cryptographically secure API keys, session tokens, and random strings.
Compare two cryptographic hashes (MD5, SHA-1, SHA-256) with timing-safe matching.
Encode any file into Base64 or decode Base64 strings back to downloadable files.
Calculate IPv4 subnet masks, CIDR network address, broadcast, and usable host range.
Generate random, unicast, multicast, or vendor-prefixed MAC hardware addresses.
Validate MAC address format and identify unicast, multicast, and OUI structure.
Check foreground and background color contrast ratio for WCAG AA and AAA accessibility compliance.
Compare and convert current time across global world cities and time zones simultaneously.
Calculate weekly shift work hours, overtime, and break times from timesheet entries.
Generate realistic random dates of birth based on age range, zodiac sign, or generation.
Find out what day of the week any past, present, or future historical date fell on.
Calculate ISO 8601 week number, start/end dates of any week, and total weeks in a year.
Calculate exact days, hours, and business days remaining until any future date or holiday.
Calculate exact chronological age (years, months, days) on any historical or future date.
Calculate relative percentage change ((New-Old)/Old*100) with sensitivity projections.
Convert numbers between arbitrary bases 2 to 36 (Binary, Octal, Decimal, Hex, Base32, Base36).
Convert modern calendar dates into Roman numerals and Classical Roman Kalends/Ides style.
High-precision online stopwatch with millisecond accuracy, lap tracking, and CSV export.
Productivity Pomodoro focus timer with customizable work/break intervals and audio chimes.